Empty method in an entity causes errors while enhancing
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Key: OPENJPA-888
URL: https://issues.apache.org/jira/browse/OPENJPA-888
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 1.2.0
Reporter: Simone Gianni
I have a class subclassing another class. Both are entities. They have a
method, which has nothing to do with JPA cause it's not a getter o a setter.
The subclass overrides this method with an empty implementation, that is
@Override public void theMethod() {} .
As a result, OpenJPA throws an error while enhancing the subclass, more
specifically the stacktrace is relative at SERP internals :
java.lang.ClassCastException: serp.bytecode.CodeEntry cannot be cast to
serp.bytecode.Instruction
at serp.bytecode.Local.getEnd(Local.java:114)
at serp.bytecode.Local.updateTargets(Local.java:155)
at serp.bytecode.LocalTable.updateTargets(LocalTable.java:163)
at serp.bytecode.Code.read(Code.java:2031)
at serp.bytecode.Attributes.readAttributes(Attributes.java:152)
at serp.bytecode.BCMember.read(BCMember.java:365)
at serp.bytecode.BCClass.read(BCClass.java:123)
at serp.bytecode.Project.loadClass(Project.java:211)
Looking the Serp code and debugging it, I can confirm it is a SERP error, and
opened a bug on its tracker
(https://sourceforge.net/tracker2/?func=detail&aid=2556092&group_id=31479&atid=402282
).
I'm opening this bug here to track the problem, and eventually use an updated
version of SERP if/when they solve the problem.
The most obvious workaround (which works) is to write something inside an empty
method, a plain "int i = 0" will do the job.
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